Home / 21,539.99-29,733.30-12,590.40

Finding the Fourth Proportional to 21,539.99, 29,733.30 and 12,590.40

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Solution

The fourth proportional to 21,539.99, 29,733.30 and 12,590.40 is: 17,379.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,539.99 : 29,733.30 = 12,590.40 : x
  2. Step 2: Convert to fraction form
    21,539.99/29,733.30 = 12,590.40/x
  3. Step 3: Cross multiply
    21,539.99x = 29,733.30 × 12,590.40
  4. Step 4: Simplify right side
    21,539.99x = 374,354,077.37
  5. Step 5: Solve for x
    x = 374,354,077.37/21,539.99
  6. Step 6: Final answer
    x = 17,379.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.